Category: Administration / Server

Freetz Alternative Firmware for Older FritzBoxes

JavaScript can compromise the user’s network devices! pretty evil are devices/routers with security problems, that can be exploited from javascript. so basically opening a webpage with a browser that has javascript enabled (which most browsers have) might scan the user’s […]

Odroid H2 as ventilator cooling ventilation airmachine

finally summer and climate change have both reached Europe and had several weeks of 30 C straight… without ventilation, anything above 30 is just “too much to think” (so maybe the brain CPU also would need active cooling?) of course […]

04.04.2020 hm…. let me think where one has seen this before: TELEGRAM! Zoom’s service is “not suited for secrets” “The researchers also found that Zoom protects video and audio content using a home-grown encryption scheme, that there is a vulnerability […]

Post-Quantum Cryptography

Videos: ssh thanks for sharing even when the audio is pretty crappy. slides (hard to read on video) can be found here: “dropbear” is ambedded ssh server Made in Australia (wiki) also available as Android App naming: a “dropbear” […]


hostnamectl; # tested on Icon name: computer-desktop Chassis: desktop Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-8-amd64 Architecture: x86-64 su – root; # become root apt update apt install rfkill rfkill list all 0: phy0: Wireless LAN Soft blocked: […]

GNU Linux Distributions – about Fedora -> CentOS -> RedHat

imho: CentOS is a rock solid server operating system. Why is CentOS perfect for servers? a server (usually) is build for a specific purpose and should have as little software installed as possible (more software = more reliability, speed and […]


basically one column view of a specific directory without all the “-rw-r–r–. 1 owner group 734 Jan 15 20:16” clutter. ls -C1 /etc/lighttpd/conf.d/*.conf /etc/lighttpd/conf.d/access_log.conf /etc/lighttpd/conf.d/auth.conf /etc/lighttpd/conf.d/cgi.conf /etc/lighttpd/conf.d/cml.conf /etc/lighttpd/conf.d/compress.conf /etc/lighttpd/conf.d/debug.conf /etc/lighttpd/conf.d/dirlisting.conf /etc/lighttpd/conf.d/evhost.conf /etc/lighttpd/conf.d/expire.conf /etc/lighttpd/conf.d/magnet.conf /etc/lighttpd/conf.d/mime.conf /etc/lighttpd/conf.d/proxy.conf /etc/lighttpd/conf.d/rrdtool.conf /etc/lighttpd/conf.d/scgi.conf /etc/lighttpd/conf.d/secdownload.conf /etc/lighttpd/conf.d/simple_vhost.conf /etc/lighttpd/conf.d/ssi.conf […]

Russian IT Security Updates 2020-01

now WITH SPICY COMMENTS X-D SecurityLab, [22.12.19 12:40] A Twitter user using the alias 08Tc3wBB created tfp0-an exploit that allows you to jailbreak the latest iPhone models with IOS 13.3. The functionality of the exploit has already been confirmed by […]

the second nftables howto – it is fast and …… complicated

firewall & pinguin: iptables where do thou go? it is said that when using “ip-sets” iptables and nftables achieve almost same performance (amounts of ips possible to block, without server becoming slow/unresponsive) Redhat and nftables on DDoS “so the only […]

gnu linux bash – ssh login as different user

situation: one is userA but wants to ssh login to server with ipv4: via userB (dedicated user for that server/task). so what one does is: make sure one can login as userB than as userA: userA: ssh -v -i […]